2024 Gmc Sierra At4x Hd Specs. Choose from either a gmc sierra 2500 hd or 3500 hd at4, and learn more about the vehicle specs, trims, and features available. Select a 2025 gmc sierra at4 and at4x hd to view feature and capability specs on the official site.

Detailed specs and features for the 2024 gmc sierra 1500 including dimensions, horsepower, engine, capacity, fuel economy, transmission, engine type, cylinders,. Here’s a list of official specs for the 2024 gmc sierra hd at4x & at4x aev edition.